GB/T 7494-1987 English PDF

US$279.00 · In stock
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GB/T 7494-1987: Water quality. Determination of anionic surfactants. Methylene blue spectrophotometric method

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7494-1987	279	Add to Cart	3 days	Water quality. Determination of anionic surfactants. Methylene blue spectrophotometric method

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Basic data

Standard ID: GB/T 7494-1987 (GB/T7494-1987)
Description (Translated English): Water quality. Determination of anionic surfactants. Methylene blue spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Z16
Classification of International Standard: 13.06
Word Count Estimation: 8,858
Date of Issue: 3/6/1987
Date of Implementation: 8/1/1987
Issuing agency(ies): National Environmental Protection Agency
Summary: This standard applies to the determination of drinking water, surface water, sewage and industrial wastewater low concentrations of methylene blue active substances, namely anionic surfactant. Under the experimental conditions, the measured object is mainly LAS, sodium alkyl sulfonates and fatty alcohol, but may have some positive and negative interference. When using 10mm pathlength cuvette sample volume is 100ml, the lowest concentration of the standard examination for 0. 05mg/L LAS, the detection limit of 2. 0mg/L LAS.

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